/*
     File: ImagesViewController.m
 Abstract: The view controller for hosting the UIImageView containing multiple images.
  Version: 2.6
 
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 */

#import "ImagesViewController.h"
#import "Constants.h"

#define kMinDuration 0.0
#define kMaxDuration 10.0

@implementation ImagesViewController

@synthesize imageView, slider;

- (void)dealloc
{
	[imageView release];
	[slider release];
	
	[super dealloc];
}

- (void)viewDidLoad
{	
	[super viewDidLoad];
	
	self.title = NSLocalizedString(@"ImagesTitle", @"");
	
	// set up our UIImage with a group or array of images to animate (or in our case a slideshow)
	self.imageView.animationImages = [NSArray arrayWithObjects:
										[UIImage imageNamed:@"scene1.jpg"],
										[UIImage imageNamed:@"scene2.jpg"],
										[UIImage imageNamed:@"scene3.jpg"],
										[UIImage imageNamed:@"scene4.jpg"],
										[UIImage imageNamed:@"scene5.jpg"],
									  nil];
	imageView.animationDuration = 5.0;
	[self.imageView stopAnimating];
	
	// Set the appropriate accessibility labels.
	[self.imageView setIsAccessibilityElement:YES];
	[self.imageView setAccessibilityLabel:self.title];
	[self.slider setAccessibilityLabel:NSLocalizedString(@"DurationSlider",@"")];
}

// called after the view controller's view is released and set to nil.
// For example, a memory warning which causes the view to be purged. Not invoked as a result of -dealloc.
// So release any properties that are loaded in viewDidLoad or can be recreated lazily.
//
- (void)viewDidUnload
{
	[super viewDidUnload];
	
	self.imageView = nil;
	self.slider = nil;
}

// slown down or speed up the slide show as the slider is moved
- (IBAction)sliderAction:(id)sender
{
	UISlider* durationSlider = sender;
	self.imageView.animationDuration = [durationSlider value];
	if (!self.imageView.isAnimating)
		[self.imageView startAnimating];
}


#pragma mark -
#pragma mark UIViewController delegate methods

// called after this controller's view was dismissed, covered or otherwise hidden
- (void)viewWillDisappear:(BOOL)animated
{	
	[self.imageView stopAnimating];
	
	// restore the nav bar and status bar color to default
	self.navigationController.navigationBar.barStyle = UIBarStyleDefault;
	[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault;
}

// called after this controller's view will appear
- (void)viewWillAppear:(BOOL)animated
{	
	[self.imageView startAnimating];
	
	// for aesthetic reasons (the background is black), make the nav bar black for this particular page
	self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;
	
	// match the status bar with the nav bar
	[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackOpaque;
}

@end

